Mitosis Animation

http://www.cellsalive.com/mitosis.htm

http://www.stanford.edu/group/Urchin/mitosis.htm

Meiosis Tutorials

http://www.biology.arizona.edu/cell_bio/tutorials/meiosis/main.html

http://www4.ncsu.edu/unity/users/b/bnchorle/www/

http://hal.weihenstephan.de/genglos/asp/genreq.asp?nr=142

Mitosis vs Meiosis animations

http://www.stanford.edu/group/Urchin/ameiosis.htm

Ployploidy:

http://www.biols.susx.ac.uk/ugteach/cws/evol1/polyploid.htm